Building-block



C. A. HADLAND.

BUILDING BLOCK.

APPLICATION min Aumm. 1919.

` LSWMQ. Patented May3,1s21.

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` @Humala CARL A. HADLANID, OF OSTRANDER, MINNESOTA.

BUILDING-BLOCK.

Specification of Letters Patent.

Patented' May 3, 1921.

Application filed August' 16, 1919. Serial No. 317,939.

To all whom t may concern A s a specification.

This invention relates tobuilding blocks, particularly to those constructed of concrete, and has for its object the provision of a reinforced concrete building block which is so constructed asto be substantially water proof.

An important object is the provision of a building block of 'this character within which are formed holes which, when a plurality of blocks are assembled will provide a continuous air space throughout the wall.

Another object is the provision of a building block of this character in which are embedded preferably galvanized sheet iron reinforcing plates which are connected by other reinforcing plates or by reinforcing wires, as preferred. l

-An additional object is the provision of a block of this character which will be simple -and inexpensive in manufacture, highly eficient and durable in use, anda general improvement in the art.

With the above and other objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed, and illustrated in the accompanying drawing, in which Figure lis a plan View of a block constructed in accordance with m invention,

Fig. 2 is a vertical longitu inal sectional view,

Fig. 3 is a tional view,

Fig. 4 is a view similar ing a slightmodication,

Fig. 5 is a view similar to Fig. 3, showing still another modification, and

Fig. 6 is a detail View of one of the reinforcing plates.

Referring more particularly to the drawing, fthe numeral 10 designates my block as a whole, which may be formed in a suitably constructed mold and which is rectangular in general outline though the ends are preferably concave, as shown at 11. Formed horizontal longitudinal secto Fig. 3, showthrough the block are centrally extending c lindrical holes 12 which not only reduce the weight of the block but which provide 4preferred embodiment of m an airspace within va wall constructed from the blonks. llxtending .transversely across the nia]or portion of the block are metallic reinforcing plates 13 which may be of any suitable size and shape but which preferably extend substantially or entirely to' the top a nd bottom surfaces of the block, As shown 1n Figs. l, 2 and 3, these plates are plain and are formed simply from iiatsheets of metal, whereas 1n Fig. 41 these plates are shown as provided at their ends with laterally directed fianges 14 which add to the sti ness of the plates.` In Fig. 5, these plates are shown as formed of corrugated metal, the corrugations 15 adding greatly to the strength of the plate. In each instance the4 plates are provided with holes 15 of any size, shape or arrangement.

Regardless of the particular formation of the plates 13, the block is additionally reinforced by means oflongitudinally extending reinforcing wires 16, two of which are employed on each side and these wires bear against the ends of the transverse plates'13 and have their terminals bent toward each other, as shown at 17.

In the formation of the'block' it is of course understood that the various reinforc ing plates and wires are disposed at the proper positions and held by any suitable means in such' positions, after which the cement is poured into the mold and around the reinforcing members so that when the block is finished these various members will be embedded therein and will be efectually concealed from view.

From the foregoing description and a study of the drawing, that I have thus provided an extremely simple and inexpensive concrete block which will be very strong and rigid in its make-up,

which will be consequently efficient and re"-V liable in use,- and which will be substantially moisture proof by virtue of the provision of it will be vapparent the various reinforcing plates extending across the major portion thereof.

WhileI` have shown and described the invention, it is ofcourse to be understoo that I reserve the right to construction, will not depart from the spirit of the invention or the scope 'of the subjoined claim.

Having thus described my invention, I claim A concrete buildir g block having embed make such changes in the form, kand arrangement of parts as dell therein" uf Dlurality of Spiced, 'Pilrallel vertivull y disposed transversely extending roinorring plates extending kacrossthe mw v jor. portion thereof and terminating Hush y with the upper yand lower surfaces ofthe block, said reinforcing plates being each y provided with a plurality ofholes arranged in 'staggered rows, and a plurality of longif their endsl inwardly directed.

y said plates, saidy reinforcing wires extending beyond the outermost plates and having Intestilnony whereof I aiix my signa- 

